1563241 has 4 divisors (see below), whose sum is σ = 1631232. Its totient is φ = 1495252.

The previous prime is 1563239. The next prime is 1563253. The reversal of 1563241 is 1423651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1423651 = 19 ⋅74929.

It is a cyclic number.

It is not a de Polignac number, because 1563241 - 2¹ = 1563239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1563271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33961 + ... + 34006.

It is an arithmetic number, because the mean of its divisors is an integer number (407808).

2^1563241 is an apocalyptic number.

It is an amenable number.

1563241 is a deficient number, since it is larger than the sum of its proper divisors (67991).

1563241 is an equidigital number, since it uses as much as digits as its factorization.

1563241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67990.

The product of its digits is 720, while the sum is 22.

The square root of 1563241 is about 1250.2963648671. The cubic root of 1563241 is about 116.0580615004.

Adding to 1563241 its reverse (1423651), we get a palindrome (2986892).

The spelling of 1563241 in words is "one million, five hundred sixty-three thousand, two hundred forty-one".